Just a quick heads up, but Spam Assassin (which we use for filtering here at Jephens) has a mis-formed filtering rule which considers 2010 to be a “grossly in the future” and therefore can’t be a valid date.
This might have been true in Y2K, but in 2010, we’re not so gross.
If you use ESVA like we do, there’s a simple enough fix which is outlined in the ESVA Forums.
Otherwise, you’ll need to fix your local.cf rules or edit the 72_active.cf file.
Further details can be found at Mike Cardwell’s blog: SpamAssassin 2010 bug.